port80 test in ubuntu_kvm_unit_tests failed with timeout

[Po-Hsu Lin]

With Joshua's comment in bug 1719524: "Nested KVM can only be tried on instance sizes with nested Hypervisor support: Ev3 and Dv3.", although the instance name is E4v3 here but I can start a KVM on it.

Test port80 test will timeout on it.

Steps:
1. git clone --depth=1 https://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
2. cd kvm-unit-tests; ./configure; make
3. Run the port80 test as root:

# TESTNAME=port80 TIMEOUT=90s ACCEL= ./x86/run x86/port80.flat -smp 1
timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel x86/port80.flat -smp 1 # -initrd /tmp/tmp.3p9PWc2SRi
enabling apic
begining port 0x80 write test
qemu-system-x86_64: terminating on signal 15 from pid 7790

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.14.0-1004-azure-edge 4.14.0-1004.4
ProcVersionSignature: User Name 4.14.0-1004.4-username-edge 4.14.14
Uname: Linux 4.14.0-1004-azure-edge x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Thu Feb 8 06:13:18 2018
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-azure-edge
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1748105

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Po-Hsu Lin (cypressyew)]

Spotted on X-KVM.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Po-Hsu Lin (cypressyew)]

It needs about 90 second to run on Azure Standard_D48_v3

$ time sudo ./tests/port80
BUILD_HEAD=5c052c90
timeout -k 1s --foreground 180 /usr/bin/qemu-system-x86_64 --no-reboot -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.cKEDR6Z0v0 -smp 1 # -initrd /tmp/tmp.o2ZRnk8tmj
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2]
enabling apic
begining port 0x80 write test
done
PASS port80

real 1m20.377s
user 0m42.160s
sys 0m38.299s

[Po-Hsu Lin (cypressyew)]

3 more tests shows it will finish around 80 ~ 110 seconds on that azure instance (with Bionic 4.15 Azure)

However, it will take about 330 seconds with the same instance on Xenial 4.15 Azure (3 attempts,

And on Oracle Bionic 4.15, it will take up to 620 second to run (5 attempts, 610 ~ 620 seconds):
$ time sudo ./tests/port80
BUILD_HEAD=4671e4ba
timeout -k 1s --foreground 1800 /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel /tmp/tmp.iqkRAFLRW3 -smp 1 # -initrd /tmp/tmp.WiUqj082JM
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2]
enabling apic
begining port 0x80 write test
done
PASS port80

real 10m17.146s
user 2m50.722s
sys 7m26.440s

So perhaps a better timeout threshold for now is 500 seconds or something.

[Po-Hsu Lin (cypressyew)]

Typo in #8, recommended to bump it up to 900 seconds

[Kelsey Steele (kelsey-steele)]

Failed on Bionic/oracle : 5.4.0-1026.26~18.04.1 : amd64

[Francis Ginther (fginther)]

Seen with linux-oracle 4.15.0-1065.73~16.04.1.

[Kleber Sacilotto de Souza (kleber-souza)]

Issue found with xenial/linux-kvm 4.4.0-1094.103.

[Guilherme G. Piccoli (gpiccoli)]

Found on Bionic/linux-kvm, cycle sru-20210412

[Guilherme G. Piccoli (gpiccoli)]

Issue observed in B/KVM, cycle sru-20210510.

[Po-Hsu Lin (cypressyew)]

This test will be removed in the future. (Removed in upstream.)

[Po-Hsu Lin (cypressyew)]

https://gitlab.com/kvm-unit-tests/kvm-unit-tests/-/commit/2805ff600e44936ce4d2c024f3ae81078c59658d

Note that even with this test removed, we might need to investigate if we need to run this for older kernels.

[Po-Hsu Lin (cypressyew)]

Test has long gone, let's close this.